linux-kernel - [PATCH v4 0/2] kernel.h: container

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Message-Id: <20170523160112.3446-1-abbotti@mev.co.uk>
Date:   Tue, 23 May 2017 17:01:10 +0100
From:   Ian Abbott <abbotti@....co.uk>
To:     linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org
Cc:     Arnd Bergmann <arnd@...db.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michal Nazarewicz <mina86@...a86.com>,
        Hidehiro Kawai <hidehiro.kawai.ez@...achi.com>,
        Borislav Petkov <bp@...e.de>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Johannes Berg <johannes.berg@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Alexander Potapenko <glider@...gle.com>
Subject: [PATCH v4 0/2] kernel.h: container_of() pointer checking

[I screwed up an 'Acked-by:' line on v3.]

Patch 2 changes the container_of() macro to improve the compatibility
checking when the member has array type.  As a bonus (?), if the pointer
neither points to a type compatible with the member nor points to a type
compatible with void, compiler errors are produced instead of warnings.

Patch 1 is a prerequisite to avoid a lot of warnings when <linux/bug.h>
is included by <linux/kernel.h>.

1) asm-generic/bug.h: declare struct pt_regs; before function prototype
2) kernel.h: handle pointers to arrays better in container_of()

 include/asm-generic/bug.h | 1 +
 include/linux/kernel.h    | 9 ++++++---
 2 files changed, 7 insertions(+), 3 deletions(-)